London Internet Exchange

"LINX" redirects here. For other uses of that word, see Linx.

London Internet Exchange

Abbreviation	LINX
Founded	1994
Location	London, United Kingdom
Website	www.linx.net
Members	393 As of October 2011
Ports	853 As of October 2011
Peak	1.161 Tbps As of December 2011
Daily (avg.)	800 Gbps As of December 2011

Telehouse Docklands, home of the London Internet Exchange since 1994.

The London Internet Exchange ("LINX") is an Internet exchange point (IXP) situated in London. It was founded in 1994 by a group of Internet service providers. LINX is a founder member of EURO-IX, a Europe-wide alliance of Internet Exchanges. It is currently the third largest neutral IXP in Europe in terms of average throughput.

LINX is a not-for-profit organisation (Company Limited by Guarantee). Internet service providers join LINX as members and sign a memorandum of understanding. Members collectively 'own' the company and all members have a single vote at AGMs and EGMs in matters relating to finances, constitution, and what activities LINX may carry out. Members also periodically elect the LINX non-executive board of directors. Members meet at regular LINX meetings to discuss technical, corporate governance, and regulatory matters. LINX has a mandate to not actively compete with its members.

Technology

LINX operates two physically separate networks or switching platforms on different architectures using equipment from different manufacturers (Extreme Networks and Juniper Networks). These networks are deployed over ten locations, each connected by multiple 10 Gigabit Ethernet connections over fibre networks.

The ten locations are:

• Telehouse North
• Telehouse East
• TeleCity Harbour Exchange (8/9 - ex TeleCity)
• TeleCity Millharbour
• TeleCity Harbour Exchange (6/7 - ex Redbus)
• TeleCity Sovereign House
• TeleCity Meridian Gate (Memaco House)
• TeleCity Powergate
• Equinix London-4
• Interxion London City

Connecting is also possible from remote locations via the 'LINX from Anywhere' scheme via a range of layer 2 service/MPLS carriers.

Redundancy of the network is managed using rapid-failover protection mechanisms such as Foundry Metro Ring Protocol (MRP) and Extreme Ethernet Automatic Protection System (EAPS). These restore connectivity within tenths of a second in the event of the loss of a network segment.

In addition to the main peering infrastructure, LINX provides managed private interconnections (via Single Mode Fibre) between LINX members, and works with a number of fibre carriers to provide rapid connection between LINX members for private circuits. These PI circuits may be used for any purpose but are mainly intended for Private Peering arrangements between members. Private Peering is sometimes more appropriate for managing large flows of traffic between ISPs and/or Content Providers.

Regulatory

LINX provides its members with an important Regulatory and Public Affairs service, and liaises where appropriate with many third parties including the Internet Watch Foundation, Ofcom, the Department of Trade and Industry, the Information Commissioner, and other government departments in matters such as content regulation, telecoms regulation, privacy and data protection, e-mail spam, online fraud/phishing, law enforcement, counter-terrorism, and other regulatory matters in the UK and Europe affecting the Internet industry.

The regulatory function of LINX is mainly to represent the member ISPs (as a group) to these third parties, respond to consultations, and report to and consult with the LINX members regarding any developments that may affect their business or operations.

LINX also produce Best Current Practice (BCP) documents for LINX members. These BCPs are developed in consultation with LINX members and other experts. Examples include a Best Current Practice for dealing with e-Mail spam and web sites that are linked to in spam messages. Members can use these BCPs when developing their own policies, but they are not obliged to do so.

In August 2004, LINX announced its BCP to members to take action against spammer-run websites, as well as websites advertised through spam. The plan also includes a crackdown on sites selling spammer tools, such as email address lists.

LINX can also provide a dispute resolution service between members where appropriate.

Other activities

LINX also carries on a number of non-core activities (NCAPs) from time to time, for example the LINX Accredited Internet Technician (LAIT) training programme.

Other services provided include a time service using atomic clocks, as well as hosting for other "Good of the Internet" services including various Internet statistics projects, numerous secondary name servers for various ccTLD domains, and instances of the F, K and I root nameservers.

See also

Some other Internet exchange points in London:

• London Internet Providers Exchange (LIPEX)
• London Network Access Point (LONAP)
• Packet Exchange (Formerly XchangePoint)

LINX hosts a number of meetings where network operators can exchange information: see List of Internet Network Operators' Groups for a list of other organizations holding similar meetings.

External links

• Official Website
• Looking glass
• LINX Memorandum of Understanding
• LINX Public Affairs
• EURO-IX
• LINX overtakes US as biggest data hub